Composite Custom Web Control and external Validator

[Rick]

Hello,

I built a composite web control that has a textbox and a date
control.
added my custom control on a webform where there are other standard
controls.
Each control on the form has a required validator.
I need to have a validator for my custom control, but don't know how
to do this.
I added a CustomValidator to the form, but in design mode, my custom
control doesn't appear in the list of controls of the validator.
Any help to work around this will be greatly appreciated.

Thanks,

Rick